CVE-2026-3854
Remote code execution via git push option injection in GitHub Enterprise Server
Description
An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an attacker with push access to a repository to achieve remote code execution on the instance. During a git push operation, user-supplied push option values were not properly sanitized before being included in internal service headers. Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7 and 3.19.4.
INFO
Published Date :
March 10, 2026, 6:19 p.m.
Last Modified :
April 28, 2026, 7:37 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update GitHub Enterprise Server to patched versions.
- Apply updates for versions 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6, or 3.19.3.
Public PoC/Exploit Available at Github
CVE-2026-3854 has a 13 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3854.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3854 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3854
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
GHES CVE Scanner — Defensive security tool for detecting CVE-2026-3854 (Git Push RCE) and CVE-2026-4821 (Management Console proxy injection) in GitHub Enterprise Server. Zero external dependencies, Python 3.8+.
Python
A concise security roundup of real, publicly disclosed vulnerabilities from April–May 2026. Focus: affected products, impact, severity, and safe mitigation steps. No exploit code included.
Zero-LLM cybersecurity news pipeline → Telegram digest. Cron-driven, ~30 feeds, severity classified.
Shell Python
CVE-2026-3854 patch bypass testing
GitHub RCE via X-Stat Push Option Injection
Python
Details about CVE-2026-3854
None
Claude Code /news skill — 新闻资讯聚合技能
SOC project: Detect brute force attacks and enrich IPs using VirusTotal threat intelligence
Python
世界中のOSSトレンドを毎日収集・分析・可視化するオープンデータプロジェクト
Python Jinja
None
None
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3854 vulnerability anywhere in the article.
-
The Hacker News
cPanel, WHM Release Fixes for Three New Vulnerabilities — Patch Now
Ravie LakshmananMay 09, 2026Vulnerability / Web Hosting cPanel has released updates to address three vulnerabilities in cPanel and Web Host Manager (WHM) that could be exploited to achieve privilege ... Read more
-
The Hacker News
Linux Kernel Dirty Frag LPE Exploit Enables Root Access Across Major Distributions
Details have emerged about a new, unpatched local privilege escalation (LPE) vulnerability impacting the Linux kernel. Dubbed Dirty Frag, it has been described as a successor to Copy Fail (CVE-2026-31 ... Read more
-
The Hacker News
Ivanti EPMM CVE-2026-6973 RCE Under Active Exploitation Grants Admin-Level Access
Ivanti is warning that a new security flaw impacting Endpoint Manager Mobile (EPMM) has been explored in limited attacks in the wild. The high-severity vulnerability, CVE-2026-6973 (CVSS score: 7.2), ... Read more
-
The Hacker News
PCPJack Credential Stealer Exploits 5 CVEs to Spread Worm-Like Across Cloud Systems
Cybersecurity researchers have disclosed details of a new credential theft framework dubbed PCPJack that targets exposed cloud infrastructure and ousts any artifacts linked to TeamPCP from the environ ... Read more
-
The Hacker News
PAN-OS RCE Exploit Under Active Use Enabling Root Access and Espionage
Palo Alto Networks has disclosed that threat actors may have attempted to unsuccessfully exploit a recently disclosed critical security flaw as early as April 9, 2026. The vulnerability in question is ... Read more
-
The Hacker News
ThreatsDay Bulletin: Edge Plaintext Passwords, ICS 0-Days, Patch-or-Die Alerts and 25+ New Stories
Bad week.Turns out the easiest way to get hacked in 2026 is still the same old garbage: shady packages, fake apps, forgotten DNS junk, scam ads, and stolen logins getting dumped into Discord channels ... Read more
-
The Hacker News
Critical Apache HTTP/2 Flaw (CVE-2026-23918) Enables DoS and Potential RCE
The Apache Software Foundation (ASF) has released security updates to address several security vulnerabilities in the HTTP Server, including a severe vulnerability that could potentially lead to remot ... Read more
-
The Hacker News
MetInfo CMS CVE-2026-29014 Exploited for Remote Code Execution Attacks
Threat actors are actively exploiting a critical security flaw impacting an open-source content management system (CMS) known as MetInfo, according to new findings from VulnCheck. The vulnerability in ... Read more
-
The Hacker News
Weaver E-cology RCE Flaw CVE-2026-22679 Actively Exploited via Debug API
A critical security vulnerability in Weaver (Fanwei) E-cology, an enterprise office automation (OA) and collaboration platform, has come under active exploitation in the wild. The vulnerability (CVE-2 ... Read more
-
The Hacker News
Progress Patches Critical MOVEit Automation Bug Enabling Authentication Bypass
Progress Software has released updates to address two security flaws in MOVEit Automation, including a critical bug that could result in an authentication bypass. MOVEit Automation (formerly Central) ... Read more
-
The Hacker News
CISA Adds Actively Exploited Linux Root Access Bug CVE-2026-31431 to KEV
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added a recently disclosed security flaw impacting various Linux distributions to its Known Exploited Vulnerabilities (KEV) c ... Read more
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The Hacker News
China-Linked Hackers Target Asian Governments, NATO State, Journalists, and Activists
Cybersecurity researchers have disclosed details of a new China-aligned espionage campaign targeting government and defense sectors across South, East, and Southeast Asia, along with one European gove ... Read more
-
The Hacker News
New Linux 'Copy Fail' Vulnerability Enables Root Access on Major Distributions
Cybersecurity researchers have disclosed details of a Linux local privilege escalation (LPE) flaw that could allow an unprivileged local user to obtain root. The high-severity vulnerability tracked as ... Read more
-
The Hacker News
Google Fixes CVSS 10 Gemini CLI CI RCE and Cursor Flaws Enable Code Execution
Google has addressed a maximum severity security flaw in Gemini CLI -- the "@google/gemini-cli" npm package and the "google-github-actions/run-gemini-cli" GitHub Actions workflow -- that could have al ... Read more
-
The Cyber Express
CVE-2026-41940: Critical cPanel Authentication Bypass Exposes Hosting Systems
A newly disclosed security issue, tracked as CVE-2026-41940, has raised significant concerns across the web hosting ecosystem, particularly for systems running cPanel and WebHost Manager (WHM). The fl ... Read more
-
security.nl
Kritiek beveiligingslek op GitHub.com gaf toegang tot miljoenen repositories
Een kritieke kwetsbaarheid op GitHub.com maakte het mogelijk om toegang tot miljoenen publieke en private repositories te krijgen. Hetzelfde beveiligingslek maakte het ook mogelijk om in het geval van ... Read more
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The Register
GitHub: Woah, a genuinely helpful AI-assisted bug report that isn't total slop. Here, Wiz, take this wad of cash
Wiz researchers are set for a tidy payday thanks to their discovery of a high-severity flaw in GitHub's git infrastructure that handed remote attackers full read/write access to private GitHub reposit ... Read more
-
The Cyber Express
GitHub Fixes Critical RCE Bug CVE-2026-3854 Within Hours of Discovery
Cybersecurity researchers have revealed critical details about a newly identified RCE vulnerability, tracked as CVE-2026-3854, affecting both GitHub’s cloud infrastructure and GitHub Enterprise Server ... Read more
-
The Hacker News
Researchers Discover Critical GitHub CVE-2026-3854 RCE Flaw Exploitable via Single Git Push
Cybersecurity researchers have disclosed details of a critical security vulnerability impacting GitHub.com and GitHub Enterprise Server that could allow an authenticated user to obtain remote code exe ... Read more
-
CybersecurityNews
Critical GitHub.com and Enterprise Server RCE Vulnerability Enables Full Server Compromise
A critical remote code execution (RCE) vulnerability tracked as CVE-2026-3854 in GitHub’s internal git infrastructure that could have allowed any authenticated user to compromise backend servers, acce ... Read more
The following table lists the changes that have been made to the
CVE-2026-3854 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 28, 2026
Action Type Old Value New Value Added Reference https://www.wiz.io/blog/github-rce-vulnerability-cve-2026-3854 -
CVE Modified by [email protected]
Apr. 17, 2026
Action Type Old Value New Value Changed Description An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an attacker with push access to a repository to achieve remote code execution on the instance. During a git push operation, user-supplied push option values were not properly sanitized before being included in internal service headers. Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 and 3.19.3. An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an attacker with push access to a repository to achieve remote code execution on the instance. During a git push operation, user-supplied push option values were not properly sanitized before being included in internal service headers. Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7 and 3.19.4. Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.14.25 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.15.20 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.16.16 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.17.13 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.18.7 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.19.4 Removed Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.14.24 Removed Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.15.19 Removed Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.16.15 Removed Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.17.12 Removed Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.18.6 Removed Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.19.3 Removed Reference Type https://docs.github.com/en/[email protected]/admin/release-notes#3.14.24 Types: Release Notes Removed Reference Type https://docs.github.com/en/[email protected]/admin/release-notes#3.15.19 Types: Release Notes Removed Reference Type https://docs.github.com/en/[email protected]/admin/release-notes#3.16.15 Types: Release Notes Removed Reference Type https://docs.github.com/en/[email protected]/admin/release-notes#3.17.12 Types: Release Notes Removed Reference Type https://docs.github.com/en/[email protected]/admin/release-notes#3.18.6 Types: Release Notes Removed Reference Type https://docs.github.com/en/[email protected]/admin/release-notes#3.19.3 Types: Release Notes -
Initial Analysis by [email protected]
Mar. 12, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* versions from (including) 3.17.0 up to (excluding) 3.17.12 *cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* versions from (including) 3.18.0 up to (excluding) 3.18.6 *cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* versions from (including) 3.19.0 up to (excluding) 3.19.3 *cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* versions up to (excluding) 3.14.24 *cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* versions from (including) 3.15.0 up to (excluding) 3.15.19 *cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:* versions from (including) 3.16.0 up to (excluding) 3.16.15 Added Reference Type GitHub, Inc. (Products Only): https://docs.github.com/en/[email protected]/admin/release-notes#3.14.24 Types: Release Notes Added Reference Type GitHub, Inc. (Products Only): https://docs.github.com/en/[email protected]/admin/release-notes#3.15.19 Types: Release Notes Added Reference Type GitHub, Inc. (Products Only): https://docs.github.com/en/[email protected]/admin/release-notes#3.16.15 Types: Release Notes Added Reference Type GitHub, Inc. (Products Only): https://docs.github.com/en/[email protected]/admin/release-notes#3.17.12 Types: Release Notes Added Reference Type GitHub, Inc. (Products Only): https://docs.github.com/en/[email protected]/admin/release-notes#3.18.6 Types: Release Notes Added Reference Type GitHub, Inc. (Products Only): https://docs.github.com/en/[email protected]/admin/release-notes#3.19.3 Types: Release Notes -
New CVE Received by [email protected]
Mar. 10, 2026
Action Type Old Value New Value Added Description An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an attacker with push access to a repository to achieve remote code execution on the instance. During a git push operation, user-supplied push option values were not properly sanitized before being included in internal service headers. Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 and 3.19.3. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-77 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.14.24 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.15.19 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.16.15 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.17.12 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.18.6 Added Reference https://docs.github.com/en/[email protected]/admin/release-notes#3.19.3